factory" (e.g. in the ``Router`` class) and ``webob.Response`` and
  the "response factory" (e.g. in ``render_template_to_response``),
  allow both to be overridden via a ZCML utility hook.  See the "Using
  ZCML Hooks" chapter of the documentation for more information.

  - Rather than prepare the "stock" implementations of the ZCML
    directives from the ``zope.configuration`` package for use under
    :mod:`repoze.bfg`, :mod:`repoze.bfg` now makes available the
    implementations of directives from the ``repoze.zcml`` package
    (see http://static.repoze.org/zcmldocs).  As a result, the
    :mod:`repoze.bfg` package now depends on the ``repoze.zcml``
    package, and no longer depends directly on the ``zope.component``,
    ``zope.configuration``, ``zope.interface``, or ``zope.proxy``
    packages.

    The primary reason for this change is to enable us to eventually
    reduce the number of inappropriate :mod:`repoze.bfg` Zope package
    dependencies, as well as to shed features of dependent package
    directives that don't make sense for :mod:`repoze.bfg`.

    Note that currently the set of requirements necessary to use bfg
    has not changed.  This is due to inappropriate Zope package
    requirements in ``chameleon.zpt``, which will hopefully be
    remedied soon.

  - BFG applications written prior to this release which expect the
    "stock" ``zope.component`` ZCML directive implementations
    (e.g. ``adapter``, ``subscriber``, or ``utility``) to function now
    must either 1) include the ``meta.zcml`` file from
    ``zope.component`` manually (e.g. ``<include
    package="zope.component" file="meta.zcml">``) and include the
    ``zope.security`` package as an ``install_requires`` dependency or
    2) change the ZCML in their applications to use the declarations
    from `repoze.zcml <http://static.repoze.org/zcmldocs/>`_ instead
    of the stock declarations.  ``repoze.zcml`` only makes available
    the ``adapter``, ``subscriber`` and ``utility`` directives.

  - The ``http://namespaces.repoze.org/bfg`` XML namespace is now the
    default XML namespace in ZCML for paster-generated applications.

  - The copies of BFG's ``meta.zcml`` and ``configure.zcml`` were
    removed from the root of the ``repoze.bfg`` package.  In 0.3.6, a
    new package named ``repoze.bfg.includes`` was added, which
    contains the "correct" copies of these ZCML files; the ones that
    were removed were for backwards compatibility purposes.

  Other

  - The minimum requirement for ``chameleon.core`` is now 1.0b13.  The
    minimum requirement for ``chameleon.zpt`` is now 1.0b7.  The
    minimum requirement for ``chameleon.genshi`` is now 1.0b2.

    ``testing.registerDummyRenderer`` is used, it now registers a
    dummy implementation using ``ITemplateRenderer`` interface, which
    is checked for when the built-in templating facilities do
    rendering.  This change also allows developers to make explcit
    named utility registrations in the ZCML registry against
    ``ITemplateRenderer``; these will be found before any on-disk
    template.

  - Added a ``repoze.bfg.testing`` module to attempt to make it
    slightly easier to write unittest-based automated tests of BFG
    applications.  Information about this class is in the
    documentation.

  - The default template renderer now supports testing better by
    looking for ``ITestingTemplateRenderer`` using a relative
    pathname.  This is exposed indirectly through the API named
    ``registerTemplate`` in ``repoze.bfg.testing``.

  Deprecations

  - The names ``repoze.bfg.interfaces.ITemplate`` ,
    ``repoze.bfg.interfaces.ITemplateFactory`` and
    ``repoze.bfg.interfaces.INodeTemplate`` have been deprecated.
    These should now be imported as
    ``repoze.bfg.interfaces.ITemplateRenderer`` and
    ``repoze.bfg.interfaces.ITemplateRendererFactory``, and
    ``INodeTemplateRenderer`` respectively.

  - The name ``repoze.bfg.chameleon_zpt.ZPTTemplateFactory`` is
    deprecated.  Use ``repoze.bfg.chameleon_zpt.ZPTTemplateRenderer``.

  - The name ``repoze.bfg.chameleon_genshi.GenshiTemplateFactory`` is
    deprecated.  Use
    ``repoze.bfg.chameleon_genshi.GenshiTemplateRenderer``.

  - The name ``repoze.bfg.xslt.XSLTemplateFactory`` is deprecated.
    Use ``repoze.bfg.xslt.XSLTemplateRenderer``.